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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 319 | /** |
| 320 | * Fires after the value of an option has been successfully updated. |
| 321 | * |
| 322 | * @since 2.9.0 |
| 323 | * |
| 324 | * @param string $option Name of the updated option. |
| 325 | * @param mixed $old_value The old option value. |
| 326 | * @param mixed $value The new option value. |
| 327 | */ |
| 328 | do_action( 'updated_option', $option, $old_value, $value ); |
| 329 | return true; |
| 330 | } |
| 331 | |
| 332 | /** |
| 333 | * Add a new option. |
| 334 | * |
| 335 | * You do not need to serialize values. If the value needs to be serialized, then |
| 336 | * it will be serialized before it is inserted into the database. Remember, |
| 337 | * resources can not be serialized or added as an option. |